Personal digital assistant



FIG. 1 is a perspective view of a personal digital assistant showing my new design; and,

FIG. 2 is a front elevational view thereof.

The broken line showing of portions of a personal digital assistant is included for purpose of illustrating environmental structure and forms no part of the claimed design. The rectangle shown in broken line forms an unclaimed boundary and the area within forms no part of the claimed design. 

The ornamental design for a personal digital assistant, as shown and described. 